A cobalt silylene (Co=Si) linkage enables a distinct metal/ligand cooperative activation of an organic azide, where nitrene transfer occurs to and from the Co⋅⋅⋅Si linkage without ligand dissociation from the 18‐electron cobalt center. This process utilizes the orthogonal binding affinities of the silicon and cobalt sites to avoid CO poisoning that would otherwise inhibit reactivity, leading to significantly improved catalytic isocyanate generation compared with related systems. The dual‐site approach demonstrates the potential of metal/main‐group bonds to access new and efficient catalytic pathways.
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Abstract -
Whited, Matthew T. ; Han, Wenlai ; Jin‐Lee, Helen J. ; DiNardo, Zach ; Watson, Emma ; Zhang, Jia ; Kohen, Daniela ( , Angewandte Chemie)
Abstract A cobalt silylene (Co=Si) linkage enables a distinct metal/ligand cooperative activation of an organic azide, where nitrene transfer occurs to and from the Co⋅⋅⋅Si linkage without ligand dissociation from the 18‐electron cobalt center. This process utilizes the orthogonal binding affinities of the silicon and cobalt sites to avoid CO poisoning that would otherwise inhibit reactivity, leading to significantly improved catalytic isocyanate generation compared with related systems. The dual‐site approach demonstrates the potential of metal/main‐group bonds to access new and efficient catalytic pathways.